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TS4855 Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer TS4855
Beschreibung LOUDSPEAKER & HEADSET DRIVER WITH VOLUME CONTROL
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 27 Seiten
TS4855 Datasheet, Funktion
TS4855
LOUDSPEAKER & HEADSET DRIVER
WITH VOLUME CONTROL
s OPERATING FROM VCC = 3.0 V to 5.0 V
s SPEAKER: Mono, THD+N @ 1 kHz is 1%
Max @ 1 W into 8 BTL
s HEADSET: Stereo, THD+N @ 1 kHz is 0.5%
Max. @ 85 mW into 32 BTL
s VOLUME CONTROL: 32-step digital
volume control
s OUTPUT MODE: Eight different selections
s Ultra low pop-and-click
s Low Shutdown Current (0.1 µA, typ.)
s Thermal Shutdown Protection
s FLIP-CHIP Package 18 X 300 µm Bumps
DESCRIPTION
The TS4855 is a complete low power audio
amplifier solution targeted at mobile phones. It
integrates, into an extremely compact flip-chip
package, an audio amplifier, a speaker driver, and
a headset driver.
The Audio Power Amplifier can deliver 1.1 W
(typ.) of continuous RMS output power into an 8
speaker with a 1% THD+N value. To the headset
driver, the amplifier can deliver 85 mW (typ.) per
channel of continuous average power into stereo
32 bridged-tied load with 0.5% THD+N @ 5 V.
This device features a 32-step digital volume
control and 8 different output selections. The
digital volume and output modes are controlled
through a three-digit SPI interface bus.
APPLICATIONS
• Mobile Phones
ORDER CODE
Part Number
TS4855IJT
Temperature
Range
-40, +85°C
Package
J
J = Flip Chip Package - only available in Tape & Reel (JT))
PIN CONNECTIONS (top view)
TS4855IJT - Flip Chip
Pin Out (top view)
April 2003
1/27






TS4855 Datasheet, Funktion
TS4855
Electrical Characteristics
5 ELECTRICAL CHARACTERISTICS
Table 4: Electrical characteristics at VCC = +5.0 V, GND = 0 V, Tamb = 25°C
(unless otherwise specified)
Symbol
Parameter
Min. Typ. Max. Unit
ICC Supply Current, all gain @ max settings
Output Mode 1, Vin = 0 V, no load
Output Mode 1, Vin = 0 V, loaded (8)
Output Mode 2,3,4,5,6,7 Vin = 0 V, no loads
Output mode 2,3,4,5,6,7 Vin = 0 V, loaded (8, 32)
mA
4.0 8
5.5 9
8.0 11
10 12
ISTANDBY Standby Current
Output Mode 0
µA
0.1 2
Voo Output Offset Voltage (differential)
Output Mode 1 to 7, Vin = 0 V, no load, Speaker Out
Output Mode 2 to 7 Vin = 0 V, no loads, Headset Out
mV
5 20
5 40
Vil “Logic low” input Voltage
0 0.4 V
Vih “Logic high” input Voltage
1.4 5 V
Po Output Power
SPKRout, RL = 8Ω, THD+N = 1%, f = 1 kHz
Rout & Lout, RL = 32Ω, THD+N = 0.5%, f = 1 kHz
800 1100
70 100
mW
THD + N Total Harmonic Distortion + Noise
Rout & Lout, Po = 70 mW, f = 1 kHz, RL = 32
SPKRout, Po = 800 mW, f = 1 kHz, RL = 8
Rout & Lout, Po = 50 mW, 20 Hz < f < 20 kHz, RL = 32
SPKRout, Po = 400 mW, 20 Hz < f < 20 kHz, RL = 8
%
0.5
1
0.5
0.5
SNR
Signal To Noise Ratio
A-Weighted, f = 1 kHz
80 dB
PSRR5)
Power Supply Rejection Ratio
SPKRout;Vripple = 200 mV Vpp, F = 217 Hz, Input Terminated 50
Gain (BTL) = 12 dB, Output mode 1,3,5,7
Rout& Lout;Vripple = 200 mV Vpp, F = 217 Hz, Input Terminated 50
Maximum gain setting, Output mode 2,3
Rout& Lout;Vripple = 200 mV Vpp, F = 217 Hz, Input Terminated 50
Maximum gain setting, Output mode 4,5
Rout& Lout;Vripple = 200 mV Vpp, F = 217 Hz, Input Terminated 50
Maximum gain setting, Output mode 6,7
58
52
50
46
61
55
53
49
dB
G2 Digital Gain Range (Rin & Lin) to Rout, Lout
-34.5
12 dB
G1 Digital Gain Range (Phone In HS) to Rout, Lout
-40.5
6 dB
Digital Gain Stepsize
1.5 dB
Stepsize Error
± 0.6
dB
6/27

6 Page









TS4855 pdf, datenblatt
TS4855
Figure 13: Spkout THD+N vs. frequency
(Output modes 1, 3, 5, 7)
10
RL = 8
BW < 125kHz
Tamb = 25°C
1
Vcc=5V
P=800mW
0.1
100
Vcc=3V
P=250mW
1000
Frequency (Hz)
10000
Figure 14: Spout THD+N vs. frequency
(Output modes 1, 3, 5, 7)
10
RL = 16
BW < 125kHz
Tamb = 25°C
1
Vcc=5V
P=500mW
Vcc=3V
P=180mW
0.1
0.01
100
1000
Frequency (Hz)
10000
Figure 15: HDout THD+N vs. frequency
(Output modes 2, 3 G=+6dB)
10
RL = 16
G=+6dB
BW < 125kHz
Tamb = 25°C
1
Vcc=3V, P=50mW
Vcc=5V, P=150mW
0.1
100
12/27
1000
Frequency (Hz)
10000
Electrical Characteristics
Figure 16: HDout THD+N vs. Frequency
(Output modes 2, 3 G=+6dB)
10
RL = 32
G=+6dB
BW < 125kHz
Tamb = 25°C
1
Vcc=3V, P=25mW
Vcc=5V, P=75mW
0.1
100
1000
Frequency (Hz)
10000
Figure 17: HDout THD+N vs. frequency
(Output modes 4, 5 G=+12dB)
10
RL = 16
G=+12dB
BW < 125kHz
Tamb = 25°C
1
Vcc=3V Vcc=5V
P=50mW P=150mW
0.1
100
1000
Frequency (Hz)
10000
Figure 18: HDout THD+N vs. frequency
(Output modes 4, 5 G=+12dB)
10
RL = 32
G=+12dB
BW < 125kHz
Tamb = 25°C
1 Vcc=3V Vcc=5V
P=25mW P=75mW
0.1
100
1000
Frequency (Hz)
10000

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